import { serve } from "https://deno.land/std@0.190.0/http/server.ts";
import { createClient } from "https://esm.sh/@supabase/supabase-js@2";

const corsHeaders = {
  "Access-Control-Allow-Origin": "*",
  "Access-Control-Allow-Headers": "authorization, x-client-info, apikey, content-type",
};

interface GetUserRequest {
  email: string;
}

serve(async (req: Request) => {
  if (req.method === "OPTIONS") {
    return new Response(null, { headers: corsHeaders });
  }

  try {
    const { email }: GetUserRequest = await req.json();

    // Validate required fields
    if (!email) {
      return new Response(
        JSON.stringify({ success: false, message: "Missing required field: email" }),
        { status: 400, headers: { ...corsHeaders, "Content-Type": "application/json" } }
      );
    }

    // Basic email validation
    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    if (!emailRegex.test(email)) {
      return new Response(
        JSON.stringify({ success: false, message: "Invalid email format" }),
        { status: 400, headers: { ...corsHeaders, "Content-Type": "application/json" } }
      );
    }

    // Initialize Supabase client with service role
    const supabaseUrl = Deno.env.get('SUPABASE_URL')!;
    const supabaseServiceKey = Deno.env.get('SUPABASE_SERVICE_ROLE_KEY')!;
    const supabase = createClient(supabaseUrl, supabaseServiceKey, {
      auth: {
        autoRefreshToken: false,
        persistSession: false
      }
    });

    console.log(`Looking up user with email: ${email}`);

    // Get user by email from auth.users
    const { data: { users }, error } = await supabase.auth.admin.listUsers();

    if (error) {
      console.error('Error listing users:', error);
      throw new Error(`Failed to lookup user: ${error.message}`);
    }

    // Find user with matching email
    const user = users?.find(u => u.email === email);

    if (!user) {
      console.log('User not found:', email);
      return new Response(
        JSON.stringify({
          success: false,
          message: "User not found",
          user_id: null
        }),
        { status: 404, headers: { ...corsHeaders, "Content-Type": "application/json" } }
      );
    }

    console.log('User found:', { id: user.id, email: user.email, emailConfirmed: user.email_confirmed_at });

    return new Response(
      JSON.stringify({
        success: true,
        user_id: user.id,
        email_confirmed: !!user.email_confirmed_at,
        created_at: user.created_at
      }),
      { status: 200, headers: { ...corsHeaders, "Content-Type": "application/json" } }
    );

  } catch (error: any) {
    console.error("Error getting user by email:", error);

    return new Response(
      JSON.stringify({
        success: false,
        message: error.message || "Failed to lookup user",
        user_id: null
      }),
      { status: 500, headers: { ...corsHeaders, "Content-Type": "application/json" } }
    );
  }
});